Ultra Dual USB drive 3.0 16GB not working in android

I have brought 2 Ultra USB drive 3.0 - 32GB & 16GB; the 32GB is easily shown on my android phone, while the 16GB isnt identified by the phone.

I have also installed the App “SanDisk Memory Zone”, and its not listed their too.

I can see flash drive in my PCs (XP and Win10).

How can I fix it? or shall I get it replaced at the local shop?


in that case as a last step you can try to format the drive on fat32 with the computer to see if that will fix the issue with the drive and the phone will then detect the dual drive. 

if that also does not help, then you can of course replace the drive with the place of purchase .